Manvel, TX: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Manvel in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. That puts Manvel in the 12th percentile nationally for seismic hazard - higher than 12% of the 4,875 US cities USGS was checked against here.

Manvel by the numbers

The raw figures: peak ground acceleration 0.032g, short-period spectral response 0.065g, 1-second spectral response 0.037g. Among 384 Texas cities in this dataset, Manvel ranks 244 for seismic hazard, the 37th percentile within the state. About 19,309 people live in Manvel, Texas.

Retrofit economics for Manvel

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Texas. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

What this means for insurance

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Manvel address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Manvel's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.